Biologists consider unifying framework to explain evolutionary puzzles

Birds are commonly thought of as being the paragon of monogamous fidelity, staying true to their mate for life. Yet, in most bird species, some nests contain offspring of individuals other than the one's tending the nest.

If you want to include this story in your blog, copy and paste this formatted text:

<p><a href="http://www.physorg.com/news163257110.html">Biologists consider unifying framework to explain evolutionary puzzles</a></p> <p>Birds are commonly thought of as being the paragon of monogamous fidelity, staying true to their mate for life. Yet, in most bird species, some nests contain offspring of individuals other than the one's tending the nest.</p>